The U.S. Fish and Wildlife Service has taken two dozen critically endangered Millerbirds Acrocephalus familiaris from their home island of Nihoa in the northwestern Hawaii and moved them to Laysan about 650 miles to the north. The hope is that a second population of the species, which numbers between 500 and 700 birds, will reduce the risk of a single catastrophic event wiping the bird from the planet. Laysan was the home of the nominate subspecies before they were extirpated in the early 1900s whereas the birds being moved are of the subspecies A. f. kingi, often called Nihoa Millerbirds. More on Millerbirds can be found on the BirdLife International Species Factsheet.
Good luck, Millerbirds!